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http://dx.doi.org/10.5933/JKAPD.2018.45.1.21

Correlation between the Inclinations of the Incisors and Lips in Mixed Dentition  

Oh, Sungdong (Department of Pediatric Dentistry, College of Dentistry, Wonkwang University)
Lee, Jewoo (Department of Pediatric Dentistry, College of Dentistry, Wonkwang University)
Kim, Jinyoung (Department of Pediatric Dentistry, College of Dentistry, Wonkwang University)
Ra, Jiyoung (Department of Pediatric Dentistry, College of Dentistry, Wonkwang University)
Publication Information
Journal of the korean academy of Pediatric Dentistry / v.45, no.1, 2018 , pp. 21-31 More about this Journal
Abstract
This study aimed to investigate the correlation between the inclinations of the incisors and lips in mixed dentition aged 7 - 11 years. Lateral cephalometric radiographs of 353 children were analyzed to measure the upper incisor inclination, lower incisor inclination, lower-nasolabial angle, and mentolabial angle in relation to the skeletal malocclusion classification. The measurements were then assessed using the Kruskal-Wallis test, Pearson correlation, and multiple regression analysis. There were significant negative correlations between the inclination of the upper incisors and lower-nasolabial angle in all classes of skeletal malocclusion. There was a negative correlation between the inclination of the lower incisors and mentolabial angle; however, class II malocclusion had a significant positive correlation. This study identified the factors that affect lip inclination and verified their associations.
Keywords
Inclination of the incisors; Lower-nasolabial angle; Mentolabial angle;
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